1. Associate Professor, Dept. of Architecture, Seoul National Univ., San 56-1 Shinrim-dong, Seoul, Korea (corresponding author).
2. Ph.D. Student, Dept. of Architecture, Seoul National Univ., San 56-1 Shinrim-dong, Seoul, Korea.
3. Professor, Dept. of Architecture, Seoul National Univ., San 56-1 Shinrim-dong, Seoul, Korea.
4. Researcher, Construction and Economy Institute of Korea, 71-2 Nonhyun-dong, Seoul, Korea.